Digital Cap Printing for Small-Batch Image Customization
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Solution Overview
Problem
Existing cap printing technologies are inflexible and costly, making it impractical to produce small batches or customized caps with variations in images or text, requiring production line interruptions and extensive setup changes for even minor modifications.
Innovation Solution
A digital printing apparatus that operates independently of the cap production line, allowing users to customize images or text on already produced caps, enabling flexible and efficient printing of small batches or individual caps without stopping the production line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional printing on metal sheets is used during cap production, then large-scale production efficiency is improved, but flexibility for small batches and customization deteriorates
Solution Approach 1:
The process is segmented into two independent stages: cap production (metal forming) and cap printing (digital printing). This allows the printing operation to be separated from the production line, enabling flexible printing of small batches without affecting cap manufacturing efficiency.
Solution Approach 2:
Caps are produced and prepared in advance without printing, then stored and printed later when needed. This preliminary production of blank caps allows the printing operation to be deferred until customization is required, enabling flexible small-batch production.
2Adaptability or versatility
If printing pads are replaced for image modifications, then image customization is achieved, but production time and costs increase
Solution Approach 1:
The mechanical printing pad system is replaced with a digital printing system using inkjet print heads. This substitution eliminates the need for physical pad replacement, allowing image changes through digital file updates alone, thus saving time and reducing costs.
Solution Approach 2:
The printing system uses digitally controllable parameters (inkjet droplet placement, color mixing ratios) to achieve image customization without physical changes to the printing mechanism. This allows rapid modification of images by changing digital parameters rather than replacing mechanical components.
3Ease of manufacture
If conventional printing equipment is used, then printing capability is provided, but ease of operation for rapid image changes deteriorates
Solution Approach 1:
The mechanical pad-based printing system is replaced with a digitally controlled inkjet system. This substitution dramatically improves ease of operation for rapid image changes, as operators only need to update digital files rather than physically replace and align printing pads.
Solution Approach 2:
The system uses digital copies of images stored as electronic files. These digital copies can be instantly retrieved, modified, and printed without physical handling of original artwork or printing plates, greatly simplifying the operation of making rapid image changes.
4Ease of manufacture
If production line interruption occurs for printing setup, then printing operation can be performed, but productivity deteriorates
Solution Approach 1:
The production system is segmented into independent cap manufacturing and cap printing operations. This segmentation allows the printing operation to occur separately after caps are produced, eliminating the need to interrupt the continuous cap production line for printing setup.
Solution Approach 2:
A buffer storage system acts as an intermediary between cap production and cap printing. Caps are produced continuously and stored in buffer, then printed on demand without interrupting the production line. This intermediary buffer decouples the two operations and maintains production continuity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables flexible and cost-effective customization of caps with digital printing, allowing immediate changes to images or text on small batches or single caps, reducing setup times and costs.
Implementation Method 1
a device for the digital printing of caps or closing components (10) for containers comprises a conveyor line (2) for conveying the caps (10) one by one, a digital printing device (31) including a series of ink-jet nozzles (34) arranged in series one after another along the conveyor line (2)
Implementation Method 2
a UV device (37), arranged after the ink-jet nozzles (34) in printing direction, for drying the ink
Data Source
AI summary
An apparatus for digital printing on closing components for containers, includes a loading container with a hopper containing the closing components from which a conveyor line originates, with the closing components being positioned on the conveyor line by means of a withdrawing device provided with a bowl. A digital printing station situated along the conveyor line includes a digital printing device with ink-jet nozzles provided to reproduce images and/or text on each metal closing component with the help of a position sensor provided to detect the position of the closing components on the conveyor line.The digital printing device is controlled by a command and control unit, to which the position sensor is connected. A user interface device allows the user to interact with the command and control unit to select and/or modify an image to be printed, on the basis of which control instructions are sent to the digital printing device so that the selected and/or modified image to be printed is reproduced on the closing components.